The publication PopSugar offered a fun and entertaining online tool called #Twinning, which will show you famous lookalike celebrity.
It is totally free and simple to use, you just need to take a picture from your webcam or with your smartphone (selfie) then upload to the site. Twinning will analyze some facial features and shows you closely resembling celebrity.
Twinning is not 100% accurate some times, you may not find your lookalike celebrity in that case change your pose in picture (selfie) and try again.
It is still a good option to have fun and to pass time, it is an interesting web application.